ConcertChat is a collaboration platform that combines persistant chat with a shared whiteboard. We designed ConcertChat to support groups in real-time as well as in asychronous problem-solving, e.g., working together on a sketch, discussing a draft, or any kind of conversation that benefits from a shared visualization space. Please try it out here:http://www.ipsi.fraunhofer.de/concert/concertChat/try.htm